Rack



FIG. 1 is a perspective view of "rack" showing our new design;

FIG. 2 is a front elevation view of "rack" showing our new design, the rear, right side and left side elevational views being identical.

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof. 

The ornamental design for "rack", as shown and described. 